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Finding the Fourth Proportional to 285,265.40, 393,672.24 and 156,209.30

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Solution

The fourth proportional to 285,265.40, 393,672.24 and 156,209.30 is: 215,572.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,265.40 : 393,672.24 = 156,209.30 : x
  2. Step 2: Convert to fraction form
    285,265.40/393,672.24 = 156,209.30/x
  3. Step 3: Cross multiply
    285,265.40x = 393,672.24 × 156,209.30
  4. Step 4: Simplify right side
    285,265.40x = 61,495,265,039.83
  5. Step 5: Solve for x
    x = 61,495,265,039.83/285,265.40
  6. Step 6: Final answer
    x = 215,572.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.